There are serious penalties for mishandling the Sacrament, but to incur, the action must be “voluntary”:

[107.] In accordance with what is laid down by the canons, “one who throws away the consecrated species or takes them away or keeps them for a sacrilegious purpose, incurs a latae sententiae excommunication reserved to the Apostolic See; a cleric, moreover, may be punished by another penalty, not excluding dismissal from the clerical state”. [Cf. Code of Canon Law 1367] To be regarded as pertaining to this case is any action that is voluntarily and gravely disrespectful of the sacred species. Anyone, therefore, who acts contrary to these norms, for example casting the sacred species into the sacrarium or in an unworthy place or on the ground, incurs the penalties laid down.[Cf. Pontifical Council for the Interpretation of Legislative Texts, Response to dubium, 3 July 1999: AAS 91 (1999) p. 918] Furthermore all will remember that once the distribution of Holy Communion during the celebration of Mass has been completed, the prescriptions of the Roman Missal are to be observed, and in particular, whatever may remain of the Blood of Christ must be entirely and immediately consumed by the Priest or by another minister, according to the norms, while the consecrated hosts that are left are to be consumed by the Priest at the altar or carried to the place for the reservation of the Eucharist.[Cf. GIRM 163, 284.]

Few consume consecrated hosts, even when they are few in number. Note that the priest consumes hosts, but that a lay minister may consume the remaining Precious Blood.

about Todd Flowerday

A Roman Catholic lay person, married (since 1996), with one adopted child (since 2001). I serve in worship and spiritual life in a midwestern university parish.

about John Donaghy

John is a lay missionary since 2007 with a parish in western Honduras. Before that he served in campus ministry and social justice ministry in Iowa. His ministry blog is http://hermanojuancito.blogspot.com

He also blogs reflections on the lectionary and saints/heroes/events of the date at http://walktheway.wordpress.com

He'll be a long-term contributor here analyzing the Latin American bishops' document from their 2007 Aparecida Conference.